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MCQOPTIONS
This section includes 2637 Mcqs, each offering curated multiple-choice questions to sharpen your 7th Class knowledge and support exam preparation. Choose a topic below to get started.
| 851. |
Small rod shaped bacteria living in sewage or soil and is oxidizing sulphur. |
| A. | Sulphur bacteria |
| B. | Lactobacillus |
| C. | Iron bacteria |
| D. | Thiobacillus |
| Answer» E. | |
| 852. |
The fugus which is commonly known as bread mold- |
| A. | Rhizopus nigricans |
| B. | Rhizopus oryzae |
| C. | Mucor |
| D. | Rhizopus oligosporus |
| Answer» B. Rhizopus oryzae | |
| 853. |
The disease caused by fungi in human is- |
| A. | Candidiasis |
| B. | Meningitis |
| C. | Tuberculosis |
| D. | Pneumonia |
| Answer» C. Tuberculosis | |
| 854. |
These are nitrogen fixing bacteria which takes nitrogen gas from air and coverts into usable form |
| A. | Rhizobium |
| B. | Nostoc |
| C. | Anabaena |
| D. | All the above |
| Answer» E. | |
| 855. |
Partially parasitic plant grown in woods of Tamilnadu are rootless plant and which grows in roots of host plant. |
| A. | Viscum album |
| B. | Santalum |
| C. | Loran thus |
| D. | Amarbel |
| Answer» C. Loran thus | |
| 856. |
Napether has heterotrophic mode of nutrition. It is _______. |
| A. | Saprophyte |
| B. | Carnivore |
| C. | Parasite |
| D. | Insectivore |
| Answer» E. | |
| 857. |
Nitrifying bacteria is used in which type of mode of nutrition. |
| A. | Heterotrophic |
| B. | Chemoautotrophic |
| C. | Photoautotrophic |
| D. | Autotrophic |
| Answer» C. Photoautotrophic | |
| 858. |
What role does the insect play in the insectivorous plant? |
| A. | Fertilization process. |
| B. | Provides nutrients to the plant. |
| C. | Dispersal of seeds. |
| D. | Provides carbon dioxide to the plant. |
| Answer» C. Dispersal of seeds. | |
| 859. |
The flower which lacks chlorophyll and has smell of rotten meat. |
| A. | Mistletoe |
| B. | Dodder |
| C. | Drosera |
| D. | Rafflesia |
| Answer» E. | |
| 860. |
Identify the plant |
| A. | Monotropa |
| B. | Rafflesia |
| C. | Sundew plant |
| D. | Nettle |
| Answer» D. Nettle | |
| 861. |
This is broom rope bacteria, is parasite on its plants and get its nutrients from the roots. |
| A. | Viscum album |
| B. | Oranbacheramosa |
| C. | Rawwolfia |
| D. | Bladderwort |
| Answer» C. Rawwolfia | |
| 862. |
The figure shown sucks juice of insects and is a best example of insectivorous plant. |
| A. | Dionea |
| B. | Sundew |
| C. | Venus fly trap |
| D. | Rafflesia |
| Answer» D. Rafflesia | |
| 863. |
A composite organism in which a mycobiont and a photosynthetic partner plays an important role. |
| A. | Cyan bacteria |
| B. | Lichen |
| C. | Moss |
| D. | Liverwort |
| Answer» C. Moss | |
| 864. |
Which statement is NOT true for Monotropa? |
| A. | It is a flowering plant |
| B. | It helps in absorption |
| C. | It is commonly known as Indian pipe |
| D. | It sucks liquid for the stem of the host |
| Answer» E. | |
| 865. |
Flowering plants whose root constitutes mycorrhizal relationship with fungal hyphae. |
| A. | Indian pipe |
| B. | Neottia idus-avis |
| C. | Bladerwort plant |
| D. | Both a and b |
| Answer» E. | |
| 866. |
Which of the following is a carnivorous plant? |
| A. | Fern |
| B. | Lichen |
| C. | Sundew |
| D. | Mould |
| Answer» C. Sundew | |
| 867. |
No green plant which get their food from dead or decaying matter. |
| A. | Fungi |
| B. | Yeast |
| C. | Agaricus |
| D. | All the above |
| Answer» D. All the above | |
| 868. |
Which part of the leaf controls the rate of loss of water to the air? |
| A. | Midrib |
| B. | Stomata |
| C. | Vascular bundles |
| D. | Veins |
| Answer» C. Vascular bundles | |
| 869. |
"Plants which have deep red or brown leaves also carry out photosynthesis". Why? |
| A. | Because they also have chlorophyll |
| B. | The colours present in leaves cover the green colour |
| C. | Because they have green stem |
| D. | Both (a) and (b) |
| Answer» E. | |
| 870. |
Rafflesia is a parasite because |
| A. | It has no chlorophyll |
| B. | It grows on roots of trees |
| C. | It sucks food from the roots of trees |
| D. | It has gigantic flowers |
| Answer» D. It has gigantic flowers | |
| 871. |
When alcohol was poured on the leaves of a plant continuously, the plant could not prepare foods on its own. What was happened? |
| A. | Alcohol dissolved the chlorophyll |
| B. | Alcohol dissolved all the minerals |
| C. | Alcohol did not allow carbon dioxide to enter the leaves |
| D. | Alcohol absorbed all the food. |
| Answer» B. Alcohol dissolved all the minerals | |
| 872. |
DIRECTIONS: Carefully observe pictures given below and answer the following questions. Which of the following is correct about the desert plants? |
| A. | It has spine-like leaves |
| B. | The spine-like leaves can take water from the atmosphere easily. |
| C. | The plants cannot carry out the process of photosynthesis |
| D. | None of the above is correct |
| Answer» B. The spine-like leaves can take water from the atmosphere easily. | |
| 873. |
Statement: All green plants have chlorophyll pigment Statement: Without chlorophyll, photo-synthesis cannot take place. From the above statements, Anita concluded that the purple colour croton plants in her garden cannot prepare food on its own. Her teacher said this is not true. Why? |
| A. | Croton plants are green but they do not contain chlorophyll |
| B. | Croton plants do not have chlorophyll but can prepare own food |
| C. | Croton plants are purple in colour but have chlorophyll which is hidden |
| D. | Croton plants are purple in colour and do not contain chlorophyll |
| Answer» D. Croton plants are purple in colour and do not contain chlorophyll | |
| 874. |
DIRECTIONS: Carefully observe pictures given below and answer the following questions. The above figure illustrates which of the following? |
| A. | Autotrophic nutrition |
| B. | Saprotrophic nutrition |
| C. | Symbiotic relationship |
| D. | None of these |
| Answer» C. Symbiotic relationship | |
| 875. |
DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Cuscuta is a parasite (ii) Cuscuta is a yellow tubrular structure that can be seen turning around the stem and branches of a tree. |
| A. | Statement (i) is correct while statement (ii) is incorrect. |
| B. | Statement (ii) is correct while statement (i) is incorrect. |
| C. | Both statements are correct. |
| D. | Both statements are incorrect. |
| Answer» D. Both statements are incorrect. | |
| 876. |
DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Photosynthesis is a process by which plants prepare their own food. (ii) Carbohydrates are simple chemical substances. |
| A. | Statement (i) is correct while statement (ii) is incorrect. |
| B. | Statement (ii) is correct while statement (i) is incorrect. |
| C. | Both statements are correct. |
| D. | Both statements are incorrect. |
| Answer» B. Statement (ii) is correct while statement (i) is incorrect. | |
| 877. |
The role of bacteria present in root nodules of leguminous plants is |
| A. | to perform photosynthesis |
| B. | to store food |
| C. | to fix atmospheric nitrogen |
| D. | none of these |
| Answer» D. none of these | |
| 878. |
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Sun is the ultimate source of energy for all living organisms. Reason (R): Sunlight is one of the essential conditions for photosynthesis to occur in plants. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but R is not the correct explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» C. A is true but R is false. | |
| 879. |
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): The green pigment present in the leaves of plants is called chlorophyll. Reason (R): This green pigment is responsible for the green colour of most of the plants. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but R is not the correct explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» C. A is true but R is false. | |
| 880. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 4 A plant was kept in a dark room for a week. Its leaves were tested with iodine solution. The test was negative. Why was the test negative? |
| A. | there was no sunlight in the room |
| B. | the leaves were not green in colour |
| C. | the iodine solution was not good |
| D. | there was no water in the pot |
| Answer» B. the leaves were not green in colour | |
| 881. |
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Plants make their food themselves and are called autotrophs. Reason (R): Human beings and other animals depend on plants for their food. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but R is not the correct explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» C. A is true but R is false. | |
| 882. |
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Water and minerals present in soil are absorbed by roots and transported to leaves. Reason (R): Carbon dioxide from air is taken through stomata present on the surface of leaves. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but R is not the correct explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» C. A is true but R is false. | |
| 883. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 4 A plant was kept in a dark room for a week. Its leaves were tested with iodine solution. The test was negative. What is tested with iodine solution? |
| A. | proteins |
| B. | starch |
| C. | fats |
| D. | All of these |
| Answer» C. fats | |
| 884. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Plants give out water through the pores present under their leaves. The plants living in deserts need to reduce the loss of water because water is scarce in deserts. The pigment present in green portions of a cactus plant is: |
| A. | Keratin |
| B. | chlorophyll |
| C. | acrotonin |
| D. | hemoglobin |
| Answer» C. acrotonin | |
| 885. |
The equation given below represents photosynthesis. \[\text{X+Water}\xrightarrow[\text{Chlorophyll}]{\text{Sunlight}}\text{Glucose+Y}\] Which of the following is represented by X and Y in the given equation? |
| A. | X - Carbon dioxide, Y- Oxygen |
| B. | X-Oxygen, Y-Carbon |
| C. | X - Carbon dioxide, Y- Hydrogen |
| D. | X - Oxygen, Y - Carbon dioxide |
| Answer» B. X-Oxygen, Y-Carbon | |
| 886. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Plants give out water through the pores present under their leaves. The plants living in deserts need to reduce the loss of water because water is scarce in deserts. Which part of a cactus plant performs photosynthesis? |
| A. | leaves |
| B. | spines |
| C. | roots |
| D. | stem |
| Answer» E. | |
| 887. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Plants give out water through the pores present under their leaves. The plants living in deserts need to reduce the loss of water because water is scarce in deserts. Which of the following is an adaptation shown by desert plants? |
| A. | They have lots of branches and leaves |
| B. | They do not shed leaves in summer |
| C. | They develop roots which come above the ground |
| D. | Their leaves are modified into spines |
| Answer» E. | |
| 888. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 There are some plants that can eat animals. A few plants can trap insects and digest them. Such plants maybe green or of some other colour. One such plant is a pitcher plant whose pitcher like structure is a modified part of the leaf. The apex of the leaf forms a lid which can open and close the mouth of the pitcher. Which of the following is correct: |
| A. | Some plants can eat animals and are called insectivorous. |
| B. | Animals eat plants and are called heterotrophs. |
| C. | Both the above are correct |
| D. | None of these is correct |
| Answer» D. None of these is correct | |
| 889. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 There are some plants that can eat animals. A few plants can trap insects and digest them. Such plants maybe green or of some other colour. One such plant is a pitcher plant whose pitcher like structure is a modified part of the leaf. The apex of the leaf forms a lid which can open and close the mouth of the pitcher. Which of the following is an insectivorous plant? |
| A. | Cuscuta |
| B. | Amarbel |
| C. | Pitcher plant |
| D. | Algae |
| Answer» D. Algae | |
| 890. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The bodies of living organisms are made of tiny units called cells. Cells can be seen only under microscope. Some organisms are made of only one cell. The cell is enclosed by a thin boundry, called the cell membrane. Cell membrane |
| A. | is the thin outer boundary of the cell |
| B. | is a semi-permeable membrane |
| C. | both the above are correct |
| D. | none of the above is correct |
| Answer» D. none of the above is correct | |
| 891. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The bodies of living organisms are made of tiny units called cells. Cells can be seen only under microscope. Some organisms are made of only one cell. The cell is enclosed by a thin boundry, called the cell membrane. In bigger bodies there are a large number of cells, whereas in some organisms there is only one cell. The cell can be seen |
| A. | with naked eye |
| B. | under the microscope |
| C. | both the above are correct |
| D. | cell cannot be seen by us. |
| Answer» C. both the above are correct | |
| 892. |
DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns. Column-I Column-II (A) Cuscuta (p) Saprophyte (B) Mushroom (q) Xerophytes (C) Nepenthes (r) Parasite (D) Cactus (s) Insectivorous |
| A. | (A) \[\to \] (r), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (q) |
| B. | (A) \[\to \] (r), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) |
| C. | (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) |
| D. | (A) \[\to \] (q), (B) \[\to \] (r), (C) \[\to \] (p), (D) \[\to \] (s) |
| Answer» C. (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) | |
| 893. |
Which of the following is an adaptation developed by the desert plants to reduce loss of water. |
| A. | They shed leaves in summer |
| B. | They develop aerial roots |
| C. | They have fleshy leaves |
| D. | They have leaves modified into spines. |
| Answer» E. | |
| 894. |
The figure given below shows part of the carbon cycle. What is process R? |
| A. | Decomposition |
| B. | Respiration |
| C. | Photosynthesis |
| D. | Nutrition |
| Answer» D. Nutrition | |
| 895. |
Which of these plants trap and feed on insects? |
| A. | Cuscuta |
| B. | China rose |
| C. | Pitcher plant |
| D. | Rose |
| Answer» B. China rose | |
| 896. |
Where does most of the water for photosynthesis come from? |
| A. | From the soil through the roots of the plant. |
| B. | From air through the tiny pores in the leaf. |
| C. | As a result of respiration within the leaf. |
| D. | From water vapour in the air. |
| Answer» B. From air through the tiny pores in the leaf. | |
| 897. |
Lichens are examples of which of the following types? |
| A. | Symbiotic algae and fungi. |
| B. | Carnivorous plants. |
| C. | Animals which can perform photosynthesis. |
| D. | Parasitic algae. |
| Answer» C. Animals which can perform photosynthesis. | |
| 898. |
Plants excrete gases through |
| A. | tiny poses in leaves |
| B. | flowers |
| C. | seeds |
| D. | small porous roots |
| Answer» B. flowers | |
| 899. |
Amarbel is an example of |
| A. | autotroph. |
| B. | parasite. |
| C. | saprotroph. |
| D. | host. |
| Answer» D. host. | |
| 900. |
In order to survive all plants need |
| A. | roots, stens and leaves |
| B. | food, water and air |
| C. | eyes, nose and ears |
| D. | light, soil and nitrients |
| Answer» E. | |